@axeddie
As far as gabapentin is concerned my brother has usually taken the maximum dose for many years without any problems. With his other meds it helps him cnsiderably.
I have known people with Epilepsy who have taken it for decades because it controls their focal seizures. When I took it for 2-3 years it didn’t help my neuropathy or my seizures and I also took the maximum dose of 3600 mg without any noticeable side effects although I wouldn’t be surprised if it contributed to my balance and memory problems. yes OK cause some people to be drowsy. If Gabapentin helps ease your pain I wouldn’t hesitate to take it long-term as long as your not having significant side effects.
Take care,
Jake